Devices and methods for providing a bolus dose in a microfluidic circuit of a pump
AssigneeCeQur SA
InventorsHermanus Stephanus Pretorius, Robert Farra, Kenneth Barnett, David Piper, Russell Ford, Edward G. Solomon, Peter Holst, Lawrence Smith
Life of this patent
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Abstract
Devices and methods for administering a medication in fluid form, the systems and methods including a basal flow path and a bolus flow path in parallel to the basal flow path. The bolus flow path includes an inlet check valve, a first outlet check valve downstream of the inlet check valve, and a piston pump disposed between the inlet check valve and the first outlet check valve. The piston pump is configured to prevent partial dosing of a bolus dose.
Claims29
A device for administering a medication in fluid form, the device comprising:
- a basal flow path;
- and
- a bolus flow path in parallel to the basal flow path, wherein the bolus flow path comprises an inlet check valve, a first outlet check valve downstream of the inlet check valve, and a piston pump disposed between the inlet check valve and the first outlet check valve, wherein the piston pump is configured to prevent partial dosing of a bolus dose.
A method for pumping a bolus dose of a fluid in a microfluidic circuit, the method comprising:
- depressing a button to move a piston disposed at least partially within a bolus chamber from a first position to a second position;
- filling the bolus chamber with the bolus dose when a protrusion attached to a resilient arm of the button reaches a distal end of a track, which corresponds to the second position of the piston;
- and
- releasing the button to move the piston disposed at least partially within the bolus chamber from the second position to the first position to increase a pressure within the bolus chamber to deliver the bolus dose.
A device for administering a bolus dose of a medication to a patient, the device comprising:
- a bolus flow path;
- and
- a piston pump disposed along the bolus flow path and configured to prevent partial dosing of a bolus dose, wherein the piston pump comprises
- a button comprising a resilient arm attached to a protrusion,
- a piston in mechanical communication with the protrusion, wherein the piston comprises a first channel having a dispensing lip and a second channel having a filling lip, wherein the protrusion is configured to move between the first channel and the second channel to engage the fill lip or the dispense lip, and
- a track configured to move the protrusion between the first channel and the second channel.
Dependencies are inferred from the claim text.